Which term correctly identifies the Energy Efficiency Existing Ship Index (EEXI)?

• A. Energy Efficiency Existing Vessel Index
• B. Emissions Efficiency Evaluation Index
• C. Energy Efficiency Extension Initiative
• D. Energy Efficiency Existing Ship Index

Answer: (D)

Energy Efficiency Existing Ship Index is the name used for a numeric measure that applies to ships already in operation to gauge their energy performance. The term breaks down as an index (a calculated value) of energy efficiency for existing ships, which is why it’s the correct phrasing. The other options mix up the wording: using Vessel instead of Ship broadens or slightly changes the term, Emissions instead of Energy shifts the focus from energy efficiency to emissions, Evaluation instead of Index changes the concept from a measurable index to a evaluative process, and Extension Initiative suggests a program extension rather than a specific index for existing ships. So the official, accurate designation that matches the concept and acronym is Energy Efficiency Existing Ship Index.